Suppress some linter warnings in tests

serverutil/proxy_headers_test.go

@@ -15,7 +15,7 @@ func TestProxyHeaders(t *testing.T) {
 		if err != nil {
 			host = r.RemoteAddr
 		}
-		io.WriteString(w, host)
+		io.WriteString(w, host) // nolint: errcheck
 	})
 
 	p1, err := newProxyHeaders(h, []string{"1.2.3.4/16"})

serverutil/tls_test.go

@@ -22,13 +22,13 @@ import (
 
 func saveCertificate(cert *x509.Certificate, path string) {
 	data := pem.EncodeToMemory(&pem.Block{Type: "CERTIFICATE", Bytes: cert.Raw})
-	ioutil.WriteFile(path, data, 0644)
+	ioutil.WriteFile(path, data, 0644) // nolint: errcheck
 }
 
 func savePrivateKey(pkey *ecdsa.PrivateKey, path string) {
 	der, _ := x509.MarshalECPrivateKey(pkey)
 	data := pem.EncodeToMemory(&pem.Block{Type: "EC PRIVATE KEY", Bytes: der})
-	ioutil.WriteFile(path, data, 0600)
+	ioutil.WriteFile(path, data, 0600) // nolint: errcheck
 }
 
 func generateTestCA(t testing.TB, dir string) (*x509.Certificate, *ecdsa.PrivateKey) {
@@ -148,10 +148,10 @@ func TestTLS_Serve(t *testing.T) {
 		},
 	}
 	h := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		io.WriteString(w, "OK")
+		io.WriteString(w, "OK") // nolint: errcheck
 	})
 
-	go Serve(h, config, ":19898")
+	go Serve(h, config, ":19898") // nolint: errcheck
 	time.Sleep(100 * time.Millisecond)
 
 	// A client without a certificate should get a transport-level error.